Ricoh B230 Service Manual

							Shift Tray 
SM 41 B793 
B793 
Booklet 
Finisher 
2.4 SHIFT TRAY 
2.4.1 UP/DOWN MOTION 
 
The shift tray motor [A] moves the tray up and down. 
The upper limit switch [B] detects when the tray moves up too far, and cuts power to the 
shift tray motor. 
The shift tray position sensor [C] checks when the tray (or the top of the stack) is at the 
correct height to receive paper. 
ƒ  Shift Mode: This is checked every 5 sheets  
ƒ  Staple Mode: This is checked every stack  
The lower limit sensor [D] detects when the tray is full. At this point, the tray cannot move 
down any more.  
						

							B793 42  SM 
2.4.2 SIDE-TO-SIDE MOTION 
 
The shift motor [A] moves the shift roller [B] from side to side. 
The shift motor HP sensor [C] detects when the mechanism is at home position. 
The upper transport motor rotates the shift roller. 
When shift mode is used, the shift motor turns on after each page is fed out. Then, for the 
next set, the shift motor turns the other way. In this way, the user can easily divide the sets.  
						

							Booklet Tray 
SM 43 B793 
B793 
Booklet 
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2.5 BOOKLET TRAY 
 
The sensor actuator arm [A] rests on the top of the stack of stapled booklets as they are 
output to the lower tray. A flap depressor [B] keeps the open ends of the booklets down. 
The front booklet tray full sensor [C] and rear booklet tray full sensor [D] detect when the 
tray is full of booklets.  
 
ƒ  The front booklet tray full sensor is mounted higher than the rear booklet tray full 
sensor. 
ƒ  The booklet tray is stationary. When it becomes full, the stapling and folding job 
stops until booklets are removed from the tray. 
ƒ  If the booklet tray is not installed (this is detected if the front and rear sensors 
remain OFF), the machine will not operate in the booklet staple and fold mode. 
When booklet mode is selected, the tray full message appears on the operation 
panel. 
The combinations of the two actuators and two sensors when the actuator arm rises 
determines the number of booklets that the tray can hold before the job stops. 
Tray full detection depends on the size of the paper and the number of sheets in one 
stapled and folded booklet. 
The condition detected by the machine (
 Ready  Full 1,  Full 2,  Full 3; see the 
illustration above) depends on the states of the sensors, as shown in the table below.  
						

							B793 44  SM 
 
Condition Front Sensor Rear Sensor 
Ready ON OFF 
Full 1  ON  ON 
Full 2  OFF  ON 
Full 3 (or booklet tray not 
installed) OFF OFF 
 
In the tables below: 
ƒ  Sht denotes sheets in a stack. 
ƒ  Cnt denotes Count (see below for an explanation).  
After a booklet is feed out, the fold roller motor stops the exit roller. The machine then 
monitors the tray full sensors every feed-out of a paper stack. The machine checks a 
certain condition, based on the size of the paper and the number of sheets in the booklet.  
Two examples are shown below the table. Tell the operators that the number of sheets that 
the lower tray can hold will vary greatly.  
- Lower Tray Full Condition Tables - 
A3 (DLT) 
Sheet 1 2 3 4 5 6 7 8 9 10 
Full 1 15 
Cnt - - - - - - - - - 
Full 2 - 3 Cnt 11  
Cnt - - - - - - - 
Full 3 - - - 16 
Cnt 12 
Cnt 2 Cnt  3 Cnt  5 Cnt  6 Cnt  7 Cnt 
 
A4 (LT) 
Sheet 1 2 3 4 5 6 7 8 9 10 
Full 1 15 
Cnt - - - - - - - - - 
Full 2 - 8 Cnt 16 
Cnt 19 
Cnt 5 Cnt2 Cnt  2 Cnt  2 Cnt  3 Cnt  4 Cnt 
Full 3 - - - - - - - - - - 
  
						

							Booklet Tray 
SM 45 B793 
B793 
Booklet 
Finisher 
- Examples - 
After the copier makes a booklet with 1 sheet of 11 x 17 inch paper, the machine checks 
every feed-out of a paper stack for the ‘Full 1’ condition. If the Full 1 condition occurs 15 
times (‘15 Cnt’ in the table above), the machine detects that the tray is full. 
After the copier makes a booklet with 5 sheets of A4/LT paper, the machine checks every 
feed-out of a paper stack for the ‘Full 2’ condition. If the Full 3 condition occurs 5 times (‘5 
Cnt’ in the table above), the machine detects that the tray is full.  
						

							B793 46  SM 
2.6 JOGGER UNIT 
 
The jogger is used in corner-staple mode and in booklet mode. 
For each sheet of paper when it arrives in the staple tray, the following is done. 
ƒ  The jogger motor [A] drives the jogger fences [B]. 
ƒ  The positioning roller solenoid moves the positioning roller [C] onto the top of the sheet. 
Then the lower transport motor turns on and the positioning roller rotates to push the 
sheet of paper against the stopper (there are two stoppers: stopper L or stopper S the 
one that is used depends on the paper size, as we shall see later.) 
The jogger HP sensor [D] detects when the jogger fences are at home position (away from 
the stack). 
The staple tray exit sensor [E] detects if a jam occurs when the machine feeds the stack out 
at the bottom of the jogger tray.  
						

							Exit Guide Plate, Paper Feed Out 
SM 47 B793 
B793 
Booklet 
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2.7  EXIT GUIDE PLATE, PAPER FEED OUT 
 
The exit guide plate [A] opens when a stapled stack is fed out. 
Also it opens every time a sheet is fed to the staple tray, to prevent the paper running into 
the exit roller during stacking. 
The exit guide plate motor [B] drives the exit guide plate. The exit guide plate HP sensor [C] 
detects when the guide plate is at home position. 
The stack feed-out belt feeds out stapled stacks. The pawl [D] on the belt moves the stack 
out to the exit. 
The stack feed-out motor [E] drives the belt. The stack feed-out HP sensor [F] detects when 
the belt is at home position.  
						

							B793 48  SM 
2.8  STAPLER UNIT MOVEMENT 
 
The machine has only one stapler [A]. It does stapling for booklets and for corner stapling. 
The stapler unit motor [B] moves the stapler from side to side. The stapler unit HP sensor 
[C] detects when the stapler unit is at home position. 
In corner staple mode, at the start of the job, the stapler moves to the position where the 
stapler will be inserted. 
In booklet mode, at the start of a job, the stapler moves to a starting position that depends 
on the paper size, as follows: 
ƒ  8.5 x 14 inches or shorter: Rear side staple position 
ƒ  Longer than 8.5 x 14 inches: Center position. When the stapler is at the center 
position, bracket [E] releases ‘stopper L’, which catches the bottom edge of the 
paper for booklet stapling with longer paper sizes. This will be described in a later 
section. 
If the stapler safety sensor [D] detects the stapler unit at its initialization, the stapler unit 
stops moving until the stack feed out belt pawl and stopper S are at home position. If the 
stapler unit does not stop, it could collide with the pawl and/or the stopper.  
						

							Stacking for Booklet Stapling 
SM 49 B793 
B793 
Booklet 
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2.9  STACKING FOR BOOKLET STAPLING 
2.9.1 OVERVIEW 
There are two stoppers near the stapler unit. These stoppers hold the stack of paper in the 
correct position during stacking. 
The stoppers are called ‘stopper S’ and ‘stopper L’. Stopper S is used for legal size paper, 
or shorter than 8.5 x 14 inches. Stopper L is used for paper that is longer than 8.5 x 14 
inches. 
 
ƒ  In corner stapling mode, the pawl on the stack feed-out belt holds the stack of 
paper. For booklet stapling, this pawl stays at home position, which is on the rear 
side, so it does not interfere with booklet stapling. 
2.9.2  8.5 X 14 (LEGAL) OR SHORTER 
 
At the start of the set, the upper retraction motor [A] turns on, and stopper S [B] moves 
down into position to catch the paper 
. The upper retraction motor also moves the upper 
clamp roller [C] into contact with the stack 
.  
						

							B793 50  SM 
 
When the stack is complete, stopper S moves away [D], and the machine feeds the stack to 
the correct position for stapling. To do this, the upper clamp roller motor [E] rotates the 
upper clamp roller. 
2.9.3  LONGER THAN 8.5 X 14 INCHES 
 
At the start of the set, the stapler moves to the center position. At this position, a bracket [A] 
on the stapler unit pushes stopper L [B]. The pawl [C] on the stopper L assembly then 
moves into position to catch the paper. The upper clamp roller holds the stack (see the